Finally, I found All Star Air Conditioning and Heating Services and have used them for many years because I found that their work was prompt, reliable, and honest. Last year, an All Star technician warned me that one of my compressors would probably not cool for more than a year because there was a slow freon leak in an aluminum coil that could not be satisfactorily repaired. (The unit is over 12 years old). At that time, he put freon on the system, and yesterday, about 9 months later, it was again out of freon. Brian gave me a discount on a new unit, which they are going to install tomorrow. I am extremely pleased with their service.I called All Star Air Conditioning and Heating Services on Thursday morning because my air conditioner had stopped working Wednesday night. All Star was able to set an appointment for the same day several hours later. The technician, David, called when he was on his way and was at the house 15 minutes later. He first checked the thermostat and saw that it indicated that its batteries were dead. I could not read the message because it was in extremely small print and the thermostat reading were not backlit. He knew to expect it. We replaced the batteries, he tightened a wire, and the air conditioning came on. David exemplified the kind of high-quality service I had come to expect from All Star.I have used All Star for many years and have always found them to be honest, reliable, caring, and very professional. Before that, I went through a number of Houston air conditioning companies and had mediocre to bad experiences with them, the worst of which included lying about repairs, jacking up their prices, and generally being unreliable. I would not use any other company.